基于磁力传动式阵列涡流探头的管道缺陷检测

doi:10.19595/j.cnki.1000-6753.tces.191283

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摘要涡流无损检测方法是一种基于电磁感应现象对金属结构进行缺陷检测的有效方法,其具有检测能力强、非接触、扫描速度快等优点。但是,对于长输金属管道结构,当探头位于管道内部时,如何实现探头的扫描是缺陷检测的关键问题。针对这一问题,该文提出并设计一种磁力传动式阵列涡流探头,用于检测长输管道结构的内壁缺陷。该探头由位于管外带永磁体的激励装置和位于管内带永磁体的检出装置组成,是一种分离式结构,两个装置可在磁力作用下同时沿着管道内外移动。在此基础上,通过数值模拟和实验验证了该分离式探头的优点,即与传统的反射式探头相比,管道内壁缺陷的检测信号具有不饱和性。同时,该探头的检出装置设计为阵列结构,能够显著提高管道缺陷检测的灵敏度和效率。最后,将所提出的磁力传动式阵列涡流探头应用于含内壁裂纹铝管的缺陷检测,通过实验验证了这种探头对管道内壁缺陷扫查检测的有效性及优势。

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	段志荣
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关键词 ：磁力传动, 分离式阵列探头, 涡流检测, 管道内壁缺陷

Abstract：Electromagnetic induction based eddy current nondestructive testing (ECT) method is an efficient method for quantitative defect detection in metal structures,which has the advantages of high detectability,non-contact and fast scanning speed.However,for the long-distance pipeline,how to realize the probe scanning is a key issue when the probe is located inside the tube.Therefore,this paper proposes and develops a novel type of magnetic force transmission array eddy current probe to detect the defects in the long-distance pipeline structure.This new probe includes excitation device outside the pipe and a pickup device inside the pipe,which is a split type structure.The whole probe can simultaneously move along the pipe under the function of magnetic force.Numerical simulation and experiment verify the advantages of this proposed split-type probe.Compared with the reflection type probe,the detection signal is unsaturated for deep buried defect.Meanwhile,the array structure of the pickup probe is designed,which can greatly improve the detection sensitivity and efficiency.Finally,the proposed novel probe is applied to detect an aluminum pipe with inner-wall cracks.The effectiveness for the scanning detection is verified through experiments.

Key words： Magnetic force transmission split type array probe eddy current testing method inner-wall defects of pipe

收稿日期: 2019-10-02

PACS:

TM154.2

基金资助:反应堆燃料及材料重点实验室基金项目、陕西省自然科学基金面上项目(2018JM1048)、国家自然科学基金项目(51877163, 11927801)、陕西省高校科协青年人才托举计划(20170601)、新疆自然科学基金项目(2019D01A76)和中国博士后科学基金项目(2018M641035)资助

通讯作者: 解社娟,女,1983年生,博士,副教授,博士生导师,研究方向为基于电磁/声/热的无损检测。E-mail:xiesj2014@mail.xjtu.edu.cn

作者简介: 段志荣,男,1990年生,博士研究生,研究方向为电磁无损检测。E-mail:duanzhirong@stu.xjtu.edu.cn

引用本文:

段志荣, 解社娟, 李丽娟, 李骥, 陈洪恩, 陈振茂. 基于磁力传动式阵列涡流探头的管道缺陷检测[J]. 电工技术学报, 2020, 35(22): 4627-4635. Duan Zhirong, Xie Shejuan, Li Lijuan, Li Ji, Chen Hongen, Chen Zhenmao. Detection of Defects in Pipeline Structures Based on Magnetic Transmission Eddy Current Array Probe. Transactions of China Electrotechnical Society, 2020, 35(22): 4627-4635.

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